u/Big_Comparison2141

Newbie here
I have a 5 gallon tank. I have a few plants in it and a sponge filter. Currently plants are the only living things in it. I am setting it up for african dwarf frogs.
My child wants a fish really badly too though.
Is that possible to have both a fish and 2 adf's in this set up? and what kind of fish?

I feel like i have a million questions lol like do I need a shrimp, how much water change, etc. All advice welcome, but especially right now the fish thing.
Thanks!